<!DOCTYPE html>
<meta charset="utf-8" />
<title>CSS Selectors Invalidation: :target pseudo-class in :has() argument</title>
<link rel="help" href="https://drafts.csswg.org/selectors/#relational">
<script src="../../../resources/testharness.js"></script>
<script src="../../../resources/testharnessreport.js"></script>
<style>
  #parent1 { color: grey; }
  #parent1:has(:target) { color: green; }

  #parent2 { color: blue; }
  #parent2:has(:not(:target)) { color: grey; }
  #parent2:has(:target) { color: green; }

  #parent3 { color: green; }
  #parent3:not(:has(:target)) { color: grey; }
</style>
<a href="#fragment">link to #fragment</a>
<a href="#fragment2">link to #fragment2</a>
<a href="#fragment3">link to #fragment3</a>
<a href="#">link to #</a>
<div id="parent1">
  1:
  <span id="fragment">Must be green when containing :target</span>
</div>
<div id="parent2">
  2:
  <span id="fragment2">Must be green when containing :target</span>
</div>
<div id="parent3">
  3:
  <span id="fragment3">Must be green when containing :target</span>
</div>
<script>
  const GREEN = "rgb(0, 128, 0)";
  const GREY = "rgb(128, 128, 128)";
  const BLUE = "rgb(0, 0, 255)";

  async function navigateFragment(fragment) {
    return new Promise(resolve => {
      let hashChanged = (e) => {
        if (location.hash.substring(1) === fragment) {
          resolve();
          window.removeEventListener("hashchange", hashChanged);
        }
      };
      window.addEventListener("hashchange", hashChanged);
      fragmentLink(fragment).click();
    });
  }

  function fragmentLink(fragment) {
    return document.querySelector(`a[href="#${fragment}"]`);
  }

  promise_test(async () => {
    const fragment = document.querySelector("#fragment");
    const fragment2 = document.querySelector("#fragment2");
    const fragment3 = document.querySelector("#fragment3");

    location.hash = "";

    assert_equals(getComputedStyle(parent1).color, GREY, "parent1 should be grey without :target");
    assert_equals(getComputedStyle(parent2).color, GREY, "parent2 should be grey without :target");
    assert_equals(getComputedStyle(parent3).color, GREY, "parent3 should be grey without :target");

    await navigateFragment("fragment");

    assert_true(fragment.matches(":target"));
    assert_equals(getComputedStyle(parent1).color, GREEN, "parent1 should be green on fragment click");
    assert_equals(getComputedStyle(parent2).color, GREY, "parent2 should be grey without :target");
    assert_equals(getComputedStyle(parent3).color, GREY, "parent3 should be grey without :target");

    await navigateFragment("fragment2");

    assert_true(fragment2.matches(":target"));
    assert_equals(getComputedStyle(parent1).color, GREY, "parent1 should be grey without :target");
    assert_equals(getComputedStyle(parent2).color, GREEN, "parent2 should be green on fragment click");
    assert_equals(getComputedStyle(parent3).color, GREY, "parent3 should be grey without :target");

    fragment2.remove();
    assert_equals(getComputedStyle(parent2).color, BLUE, "parent2 should be blue after removing only child");

    parent2.append(fragment2);

    // Skip to check parent2 color since there is nothing in the spec mentioning DOM mutations affecting the target element.
    // - https://html.spec.whatwg.org/multipage/browsing-the-web.html#scroll-to-fragid

    await navigateFragment("fragment3");

    assert_true(fragment3.matches(":target"));
    assert_equals(getComputedStyle(parent1).color, GREY, "parent1 should be grey without :target");
    assert_equals(getComputedStyle(parent2).color, GREY, "parent2 should be grey without :target");
    assert_equals(getComputedStyle(parent3).color, GREEN, "parent3 should be green on fragment click");

    await navigateFragment("");

    assert_equals(location.hash, "");
    assert_equals(getComputedStyle(parent1).color, GREY, "parent1 should be grey without :target");
    assert_equals(getComputedStyle(parent2).color, GREY, "parent2 should be grey without :target");
    assert_equals(getComputedStyle(parent3).color, GREY, "parent3 should be grey without :target");
  });
</script>
